﻿using Health.Infrastructure.Interface;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Health.Infrastructure.Important
{
    public class BaseRepository<T>:IBaseRepository<T> where T : class
    {
        /// <summary>
        /// 上下文
        /// </summary>
        private readonly MyDbContext db;
        /// <summary>
        /// 数据库上下文
        /// </summary>
        public MyDbContext DB
        {
            get { return db; }
        }
        /// <summary>
        /// 构造方法
        /// </summary>
        /// <param name="db">上下文</param>
        public BaseRepository(MyDbContext db)
        {
            this.db = db;

        }

        // <summary>
        /// 获取全部
        /// </summary>
        /// <returns>返回集合</returns>
        public IQueryable<T> GetAll()
        {
            return db.Set<T>().AsQueryable();
        }
        /// <summary>
        /// 添加
        /// </summary>
        /// <param name="entity">实体</param>
        /// <returns>受影响行数</returns>
        public async Task<int> AddAsync(T entity)
        {
            await db.Set<T>().AddAsync(entity);
            return await db.SaveChangesAsync();
        }
        /// <summary>
        /// 更新
        /// </summary>
        /// <param name="entity">实体</param>
        /// <returns>受影响行数</returns>
        public async Task<int> UpdateAsync(T entity)
        {
            db.Set<T>().Update(entity);
            return await db.SaveChangesAsync();
        }
        /// <summary>
        /// 批量添加
        /// </summary>
        /// <param name="entities">实体集合</param>
        /// <returns>受影响行数</returns>
        public async Task<int> AddRange(IEnumerable<T> entities)
        {
            await db.Set<T>().AddRangeAsync(entities);
            return await db.SaveChangesAsync();
        }
        /// <summary>
        /// 批量更新
        /// </summary>
        /// <param name="entities">实体集合</param>
        /// <returns>受影响行数</returns>
        public async Task<int> UpdateRange(IEnumerable<T> entities)
        {
            db.Set<T>().UpdateRange(entities);
            return await db.SaveChangesAsync();
        }

        public async Task<T> GetById(int id)
        {
            return await db.Set<T>().FindAsync(id);

        }

        public async Task<int> DeleteAsync(T entity)
        {
            db.Set<T>().Remove(entity);
            return await db.SaveChangesAsync();
        }

        public async Task<int> DeleteRange(IEnumerable<T> entities)
        {
            db.Set<T>().RemoveRange(entities);
            return await db.SaveChangesAsync();
        }
    }
}
